Port Security Improvements Act of 2003

Port Security Improvements Act of 2003 - Makes available to the Secretary of Homeland Security for security enhancements at each port over each of the next five fiscal years 30 percent of the difference between the amount of duties collected at each port and the port's security costs.

Requires the Secretary of the department in which the Coast Guard is operating to issue: (1) final regulations governing biometric transportation security cards within one year; and (2) regulations that establish a national minimum set of standard security requirements for each port in the United States, each facility in a port in the United States, and each vessel entering a U.S. port.